IOWA CITY — A North Liberty man faces up to 35 years in prison for plotting to kill his former business associate and his family in a failed scheme in 2016.Justin L. DeWitt, 38, pleaded guilty Monday in Johnson County District Court to two counts of attempted murder and two counts of solicitation to commit murder.6th Judicial District Judge Lars Anderson ran the two attempted murder charges concurrently and the two solicitation charges concurrently and then consecutively to the murder charges for a total of 35 years in prison, in accordance with the plea agreement.DeWitt, a former landscaper, admitted during the plea to hiring a person he thought was a hit man — but actually was an undercover officer, with the specific intent to kill on June 27, 2016.